Cant add ports to shared uplink set through GUI

Hi,

I'm using Virtual Connect Manager v2.12. When I use the "Define->Shared Uplink Set" menu option the "Define New Shared Uplink Set" wizard shows up but "Add Port" button doesnt display on the "External Uplink Ports" box. Through the CLI I'm able to add the shared uplink set and add ports to it, but not through the GUI.